S
M
T
W
T
F
S
26
59°
44°
27
64°
44°
28
65°
41°
29
67°
38°
30
66°
42°
1
69°
40°
2
73°
42°
3
78°
45°
4
74°
52°
5
72°
43°
6
59°
41°
7
73°
37°
8
82°
46°
9
83°
50°
10
80°
47°
11
88°
49°
12
94°
54°
13
92°
57°
14
87°
58°
15
88°
49°
16
85°
57°
17
72°
49°
18
54°
42°
19
65°
40°
20
71°
43°
21
79°
44°
22
71°
49°
23
81°
56°
24
87°
60°
25
85°
62°
26
76°
58°
27
83°
60°
28
81°
54°
29
85°
58°
30
86°
64°
31
89°
62°
1
90°
63°
2
91°
64°
3
84°
56°
4
83°
56°
5
81°
54°
6
85°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Junction
Grand Junction's May 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 44° and 64°. The average high for May is 83° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Grand Junction. See also: June | July | August.
